The authors discuss the importance of intellectual property rights when using Web 2.0 tools for development. They describe a project working with Canadian communities to revitalise their language. Using a range of tools and approaches including participatory video, the project also developed a series of short language-learning videos which were uploaded to video-sharing websites. However, not all the material generated was made available online. The participants strictly limited how much of their valuable cultural knowledge was made public, retaining much of it within their own communities.